2.4.2. Linearity
Linearity is evaluated through a graphical representation of ‘concentration’ versus ‘absorbance’, the measured absorbance at k= 213.9 nm depending on total zinc concentration of zinc standard solutions. Table 2 shows the necessary data for obtaining the calibration curve, limit of detection and limit of quantization. Fig. 1 shows the regression line in the prediction interval. The linearity verifies for total Zn determination through flame atomic absorption spectrometry.